Mini greenhouse



FIG. 1 is a front elevational view of a mini greenhouse showing my new design, the rear view being a mirror image thereof;

FIG. 2 is a top plan view of my design;

FIG. 3 is an end elevational view of my design, the opposite end view being a mirror image thereof; and,

FIG. 4 is a top plan view of my design with the cover and contents omitted for clarity of illustration, the bottom plan view being a mirror image thereof. 

The ornamental design for a mini greenhouse, as shown and described. 